FEATURES

FAMILY

DESCRIPTION

Also known as MAFB_MOUSE, Mafb, Krml, Maf1. Acts as a transcriptional activator or repressor. Plays a pivotal role in regulating lineage-specific hematopoiesis by repressing ETS1-mediated transcription of erythroid-specific genes in myeloid cells. Required for monocytic, macrophage, osteoclast, podocyte and islet beta cell differentiation. Involved in renal tubule survival and F4/80 maturation. Activates the insulin and glucagon promoters. Together with PAX6, transactivates weakly the glucagon gene promoter through the G1 element. SUMO modification controls its transcriptional activity and ability to specify macrophage fate. Binds element G1 on the glucagon promoter. Involved either as an oncogene or as a tumor suppressor, depending on the cell context. Required for the transcriptional activation of HOXB3 in the rhombomere r5 in the hindbrain (PubMed:11823429). Homodimer or heterodimer with other bHLH-Zip transcription factors. Forms homodimers and heterodimers with FOS, FOSB and FOSL2, but not with JUN proteins (JUN, JUNB and JUND). Interacts with the intracellular cytoplasmic domain of LRP1 (LRPICD); the interaction results in a moderate reduction of MAFB transcriptional potential (By similarity). Binds DNA as a homodimer or a heterodimer. Interacts with PAX6; the interaction is direct. Interacts with ETS1 and LRP1.

EXTERNAL LINKS

Mafb

Transcription factor MafB

Mafb

Molecular Synopsis